CN101713458B - Transmission gear selection and engine torque control method and system - Google Patents
Transmission gear selection and engine torque control method and system Download PDFInfo
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- CN101713458B CN101713458B CN200910179503.9A CN200910179503A CN101713458B CN 101713458 B CN101713458 B CN 101713458B CN 200910179503 A CN200910179503 A CN 200910179503A CN 101713458 B CN101713458 B CN 101713458B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
- B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/02—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used
- F16H61/0202—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric
- F16H61/0204—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal
- F16H61/0213—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing characterised by the signals used the signals being electric for gearshift control, e.g. control functions for performing shifting or generation of shift signal characterised by the method for generating shift signals
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W2050/0001—Details of the control system
- B60W2050/0019—Control system elements or transfer functions
- B60W2050/0028—Mathematical models, e.g. for simulation
- B60W2050/0031—Mathematical model of the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0638—Engine speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2510/00—Input parameters relating to a particular sub-units
- B60W2510/06—Combustion engines, Gas turbines
- B60W2510/0657—Engine torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2520/00—Input parameters relating to overall vehicle dynamics
- B60W2520/10—Longitudinal speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2540/00—Input parameters relating to occupants
- B60W2540/10—Accelerator pedal position
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H2059/366—Engine or motor speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/24—Inputs being a function of torque or torque demand dependent on the throttle opening
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/36—Inputs being a function of speed
- F16H59/44—Inputs being a function of speed dependent on machine speed of the machine, e.g. the vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/84—Data processing systems or methods, management, administration
Abstract
The present invention relates to a transmission gear selection and engine torque control method and system. A method and control system for a transmission in communication with an engine includes a pedal input interpreter module determining a power demand signal from a pedal position and a vehicle speed. The system also includes a real time gear selection module determining an engine speed of each gear in response to the vehicle speed and power demand signal, determining an engine torque of each gear in response to the vehicle speed and power demand signal, determining a transmission component speed of each gear in response to the vehicle speed and power demand signal and determining a gear selection for the transmission from the power demand signal, the engine speed, the engine torque, and the transmission component speed. The system may also use the cost signal of each gear and penalty signal of each gear for determining the gear selection.
Description
The cross reference of related application
The application requires the U.S. Provisional Patent Application No.61/103 submitting on October 6th, 2008,004 rights and interests.By reference the disclosure of above-mentioned application is incorporated into this.
Technical field
The present invention relates to vehicle, what relate more specifically to that gear in automatic transmission selects determines.
Background technique
Internal combustion (IC) machine produces moment of torsion by combustion fuel and air mixture.Moment of torsion provides propelling force by speed changer and other drivetrain components to wheel.
Referring now to Fig. 1, automatic transmission utilizes gearshift map to determine that speed changer adds downshift to the point of various gears.As shown in fig. 1, show typical gearshift map, wherein solid line represents the speed line that shifts up, and dotted line represents downshift speed line.Shift-up speed line and downshift speed line are based on throttle position and the speed of a motor vehicle.Because control only limits to two variablees, therefore control and have limitation.In determining, gear shift possibly cannot correctly consider some condition.
Summary of the invention
Therefore, the present invention overcomes the only problem of the limited gear shift control performance based on closure and the speed of a motor vehicle.Can in shift decision, consider that various other conditions are to improve cornering ability and the fuel economy of speed changer and associated vehicle.
In aspect one of the present disclosure, a kind of method of controlling the automatic transmission of automotive vehicle comprises: according to pedal position and the speed of a motor vehicle, determine power request signal; In response to the described speed of a motor vehicle and described power request signal, determine the engine speed of each gear; In response to the described speed of a motor vehicle and described power request signal, determine the Engine torque of each gear; In response to the described speed of a motor vehicle and described power request signal, determine the transmission components speed of each gear; And the gear selection of determining described speed changer according to described power request signal, described engine speed, described Engine torque and described transmission components speed.
In one side more of the present disclosure, a kind of method of controlling automatic transmission comprises: for having the speed changer of gear, determine speed changer turbine trip speed; In response to described turbine trip speed and power request, determine engine speed; In response to described engine speed and power request, determine Engine torque; In response to described engine speed and Engine torque, determine the cost function of each gear; That in response to engine speed and Engine torque, determines each gear penalizes damage (penalty); Cost and penalizing of each gear in response to each gear are damaged definite minimum cost gear; And order automatic transmission is selected described minimum cost gear.
In another aspect of the present disclosure, a kind of and the control system for speed changer motor communication comprise the pedal input explanation module of determining power request signal according to pedal position and the speed of a motor vehicle.This system also comprises real-time gear selection module, it determines the engine speed of each gear in response to the described speed of a motor vehicle and power request signal, in response to the described speed of a motor vehicle and power request signal, determine the Engine torque of each gear, in response to the described speed of a motor vehicle and power request signal, determine the transmission components speed of each gear, and according to power request signal, described engine speed, described Engine torque and described transmission components speed, determine the gear selection of described speed changer.This system also comprises Engine torque order generation module, and it determines Engine torque order in response to power request and engine speed.
From detailed description provided below, will know other application of the present invention.Should be appreciated that these detailed descriptions and specific embodiment explanation the specific embodiment of the present invention in only for the object of explanation, be not intended to limit the scope of the invention.
Accompanying drawing explanation
From describing in detail and accompanying drawing will comprehend the present invention, in the accompanying drawings:
Fig. 1 illustrates and shifts up and the closure of the downshift shown in broken lines figure to the speed of a motor vehicle with solid line;
Fig. 2 is according to the schematic diagram that the present invention is based on the example vehicle of generator torque estimating system operation;
Fig. 3 is the schematic block diagram of the control module of selecting for definite real-time gear of Fig. 2;
Fig. 4 is the schematic block diagram that the real-time gear of Fig. 3 is selected module;
Fig. 5 is the schematic block diagram of moment of torsion and the turbine trip speed determination module in velocity calculator 102 of Fig. 4;
Fig. 6 is the schematic block diagram of the moment of torsion of Fig. 4 and a part for velocity calculator;
Fig. 7 is the schematic block diagram that the most optimal gear of Fig. 4 is selected module;
Fig. 8 is the schematic block diagram of the first mode of execution of cost determination module;
Fig. 9 is the schematic block diagram of the second mode of execution of cost determination module;
Figure 10 is the schematic block diagram of the 3rd mode of execution of cost determination module;
Figure 11 is the schematic block diagram of the 4th mode of execution of cost determination module;
Figure 12 is the schematic block diagram of penalizing the first mode of execution that damages determination module;
Figure 13 is the schematic block diagram of penalizing the second mode of execution that damages determination module;
Figure 14 is the schematic block diagram of penalizing the 3rd mode of execution that damages determination module.
Embodiment
In fact, the following description of preferred implementation is only schematically, and is not intended to limit absolutely the present invention and application or use.For clarity sake, in accompanying drawing, with identical reference character, represent similar element.With in this article time, term " module " refers to specific integrated circuit (ASIC), electronic circuit, carries out the processor of one or more softwares or hardware program (share, special use or group) and storage, combinational logic circuit and/or other suitable components of described function is provided.
Referring now to Fig. 2, example vehicle 10 comprises motor 12, generator 14 and speed changer 16.Motor 12 produces the driving torque that drives generator 14 and speed changer 16.More particularly, motor 12 is by air intake intake manifold 18, and intake manifold 18 is assigned to air in cylinder (not shown), and air forms air/fuel mixture in cylinder with fuel-bound.Air/fuel mixture burns and drives the piston (not shown) in cylinder, thereby driving crank 20 produces driving torques.By producing spark by spark plug (not shown), start combustion process.Can be with respect to piston the position regulation in cylinder (that is, lag behind or in advance) thus spark timing regulates delivery temperature, Engine torque and manifold absolute pressure (MAP).
Motor 12 and alternator 14 connect via band system 22.Motor 12 and generator 14 comprise respectively belt wheel 24,26, and they are by being with 28 to connect to be rotated.Belt wheel 24 connects to be rotated with the bent axle 20 of motor 12.Motor 12 drives generator 14 to produce Vehicular system electric energy used and/or energy storage device (ESD) 30 is charged.Generator 14 comprises the variable load (T on motor 12
gEN), it is regulated by pressure governor (VR) 32.When need to be from more electric energy of generator 14, VR 32 increases T
gENthereby, the workload of increase motor.When need to be from the still less electric energy of generator 14, VR 32 reduces T
gENthereby, reduce the workload of motor.
Speed changer 16 can comprise automatic transmission and/or auto-manual transmission (AMT).Driving torque is passed to speed changer 16 by coupling arrangement 34 from engine crankshaft 20.According to the implementation type of speed changer, coupling arrangement 34 can include but not limited to friction clutch or torque converter.Speed changer 16 makes driving torque double to drive transmission shaft 36 by one in a plurality of gear ratios.
Control module 38 regulates the operation of vehicle 10 based on generator torque estimating system of the present invention.Control module 38 control engine air-flows, fuel injection, spark and alternator load, to regulate Engine torque output.Manifold absolute pressure (MAP) sensor 40 is in response to the MAP in intake manifold 18, and produces MAP signal based on this.Engine temperature sensing unit 42 produces engine temperature signal in response to engine temperature and based on this.Expectation can be determined engine temperature by coolant temperature and/or the oil temperature of motor 12.External temperature sensor 44 produces external temperature signal in response to external temperature and based on this.Expectation can further be determined engine temperature based on external temperature.Velocity transducer 46 is in response to the rotating speed (RPM) of motor 12 and produce rate signal based on this.Accelerator pedal 48 is provided with the pedal position sensor 50 of the position of induction accelerator pedal 48.Pedal position sensor 50 produces pedal position signal based on this.
Vehicle speed sensor 60 also can with control module 38 communications.Vehicle speed sensor 60 produces the vehicle speed signal corresponding with the speed of a motor vehicle.
Storage 62 also can be associated with control module 38.Storage 62 can be stored other value of constant used in various intermediate computations values and calculating and so on.For example, wheel parameter, final velocity ratio, gear ratio efficiency and motor fuel all can be stored in this storage than question blank used.This storage can be various types of storagies or comprise volatile memory, nonvolatile memory and the not combination of the storage of dead-file.
Referring now to Fig. 3, show the details in control module 38.Pedal input explanation module 80 receive with from pedal position sensor 50 with pedal position signal 76 corresponding to pedal position and from the vehicle speed signal 78 of the vehicle speed sensor 60 shown in Fig. 2.Based on pedal position signal 76 and vehicle speed signal 78, produce power request signal 82.Power request signal 82 is transferred to Engine torque order generation module 84, and this Engine torque order generation module 84 produces the engine-driving torque command 86 that transfers to the engine control module 88 based on moment of torsion based on power request signal.In response to the driving torque of order, motor is controlled to realize to power and the engine-driving moment of torsion of order.
Engine torque order maker 84 is by producing engine-driving torque command by power request divided by present engine speed simply.Engine control system 88 based on moment of torsion is controlled various control parameters of engine to carry the Engine torque of expectation.
Return to reference to pedal input explanation module 80, from the power request signal 82 of its generation, be also transferred to real-time gear selection module 90.Real-time gear is selected module 90 received power demand signal and vehicle speed signal, and produces and transfer to the speed changer of Fig. 2 or the expectation gear signal 92 of control module associated with it.Transmission gear is selected based on expectation gear signal 92.
Referring now to Fig. 4, the real-time gear that illustrates in greater detail Fig. 3 is selected module 90.Real-time gear is selected module 90 to comprise and is used to all gear calculated torque of the speed changer 16 being associated and moment of torsion and the speed calculation module 102 of speed.This moment of torsion and speed calculation module are each gear calculation engine rate signal 104.Moment of torsion and speed calculation module 102 are also each gear calculation engine torque signal 106.Moment of torsion and speed calculation module 102 are also for each gear calculates turbine speed signal 108.Moment of torsion and speed calculation module 102 are also that each gear of speed changer calculates turbine torque signal 110.Speed and torque signal 104,106,108,110 are transferred to most optimal gear and select module 114, and this most optimal gear is selected the cost function minimized transmission gear ratio of module 114 for selecting to limit in cornering ability constraint subsequently.The operation of this module will be further described below.Most optimal gear selects module 114 to be output as expectation gear signal 92.
Referring now to Fig. 5, the moment of torsion of Fig. 4 and velocity calculator 102 comprise turbine trip speed calculator 120.Turbine trip speed calculator 120 is each gear generation turbine speed signal 122.Speed changer comprises the torque converter with turbine and pump, and it is for connecting motor and speed changer.The wheel parameter 124 of vehicle speed signal 78 and wheel offers division frame 126.Wheel parameter 124 can be the constant in the storage 62 that is stored in Fig. 2.The speed of a motor vehicle obtains the rotating speed of wheel divided by wheel parameter.Multiplication frame 128 increases speed doubly final velocity ratio, is multiplied by gear ratio 132 again, thereby turbine is provided at multiplication frame 130 places.Wheel parameter 124, final velocity ratio 129 and gear ratio 132 are all constant, and these constants can be stored in the storage 62 being associated with control module or be stored in control module.
Referring now to Fig. 6, moment of torsion and speed calculation module 102 then can be calculated engine speed, turbine moment of torsion and Engine torque in engine speed, moment of torsion and turbine torque arithmetic module 150.Module 150 can comprise decision block 152, and it contrasts turbine trip speed 122 and the speed of torque converter clutch.When turbine trip speed is not more than torque converter clutch and applies speed, power request signal 82 and turbine speed signal 122 are provided to question blank 160, with the torque converter clutch inquiry engine speed based on just opening.From table 160 output engine speed 162.And power request signal 82 and turbine speed signal 122 provide to another question blank 164, to determine that transducer clutch opens the turbine moment of torsion in situation.Question blank 164 utilizes power request signal 82 and turbine trip speed 122 to determine turbine torque signal 166.And power request signal is determined engine torque signal 168 divided by engine speed signal in frame 167.
When in frame 152, turbine trip speed is greater than torque converter clutch and applies speed, in frame 170, engine speed is defined as turbine trip speed and adds torque converter slip velocity, and Engine torque is defined as power request divided by engine speed, and turbine moment of torsion is defined as Engine torque and is multiplied by efficiency.Finally, engine speed signal 162, turbine torque signal 166 and Engine torque are provided to most optimal gear selection module 114 from moment of torsion and velocity calculator.
Referring now to Fig. 7, further show in detail most optimal gear and select module 114.Conventionally, in frame 210, be that each gear executory cost function of speed changer calculates.Penalize damage computing module 212 to be constrained to each gear calculating based on cornering ability and penalize damage.Cost function module 210 produces cost signal 214, and is provided to arithmetic frame 216.Penalize damage computing module 212 to produce to penalize and damage signal 218, and provided to algorithm calculations frame 216.Algorithm calculations frame 216 can make cost signal and penalize damage signal multiplication, be divided by, be added or subtract each other, and finally for each gear is determined ultimate cost.Ultimate cost signal 220 provides to contrast module or determination module 222, and this module is determined the expectation gear with minimum ultimate cost by the contrast ultimate cost associated with each gear.Finally, speed changer switches to this gear with minimum ultimate cost in response to frame 222.
Referring now to Fig. 8, show the first mode of execution of cost function 210A.It should be pointed out that each cost function carries out for each gear in speed changer.In the first cost function, question blank 240 utilizes engine speed signal 162 and engine torque signal 168 to produce motor fuel than signal 242.Engine speed 162 and Engine torque 168 also multiply each other at arithmetic frame 244 places.Engine speed is multiplied by Engine torque, in order to obtain engine power signal 246.Fuel ratio is divided by engine power, in order to obtain the cost signal 214A of each gear.Thereby in this case, engine speed and Engine torque are finally for cost signal 214A.
Referring now to Fig. 9, show the second cost function 210B.In this embodiment, in Fig. 8, question blank 240 utilizes engine speed signal 162 and engine torque signal 168 to determine that motor fuel is than signal 242.Yet in this embodiment, turbine speed signal 122 and turbine torque signal 166 provide to multiplication frame 250, to obtain turbine power signal 252.Motor fuel than 242 divided by turbine power, with procurement cost signal 214B.
Referring now to Figure 10, show in order to determine the 3rd mode of execution of cost function signal 210C.In this embodiment, to determine that with mode identical in Fig. 8 and Fig. 9 motor fuel is than signal 242.In this embodiment, turbine torque signal 166 is multiplied by gear ratio 132, so that power signal 260 to be provided.In arithmetic frame 248, fuel ratio is divided by power signal, with procurement cost signal 214C.
Referring now to Figure 11, show the similar mode of execution of mode of execution with Figure 10.In this embodiment, produce fuel cost signal 214C, make it be multiplied by the first flexible strategy 260, to obtain for the weighted cost signal 262 of overall cost signal 264 is provided.
Overall cost signal 264 also has its discharge unit.Engine speed signal 162 and engine torque signal 168 provide to question blank 266, to provide the motor discharge amount providing with system corresponding motor discharge signal 268.In arithmetic frame 272, motor discharge signal 268 is multiplied by the second flexible strategy 270, to form weighting motor discharge signal 274.Weighting motor discharge signal 274 and weighting fuel cost signal 262 are added and form ultimate cost signal 264 in frame 276.This can be each gear and carries out.Finally, control module is determined least cost for each gear.
Referring now to Figure 12, can be each gear formation and penalize damage to determine.Figure 12 illustrates penalizing of Fig. 7 and damages the first mode of execution 212A calculating.In this embodiment, engine speed signal 162 provides to question blank 310, so that maximum engine torque signal 312 to be provided.Power request signal 82 transfers to question blank 314 to determine torque reserve signal 316.From question blank, produce torque reserve signal 316, and provided to arithmetic frame 318, this frame makes torque reserve signal 316 and 312 combinations of maximum engine torque signal.This arithmetic frame can make torque reserve signal 316 deduct to obtain permitting torque signal 320 from maximum engine torque signal 312.License torque signal 320 and engine torque signal 168 provide to decision block 322.This decision block determines whether Engine torque is greater than license moment of torsion.If Engine torque is greater than license moment of torsion, the high damage of penalizing of mark in frame 324.In frame 322, if Engine torque is not more than license moment of torsion, in frame 326, nothing is penalized damage.
Referring now to Figure 13, determine in order to determine another mode of execution 212B of cost.In this embodiment, power request signal 82 is provided to question blank 340, to obtain permitting minimum engine speed signal 342.Engine speed signal 162 is provided to decision block 344, to determine that whether engine speed is lower than license engine speed.If lower than license engine speed, starting high penalizing in 346, engine speed damages sign.If engine speed is not less than license engine speed, does not penalize and damage and in step 348, provide zero to penalize damage sign.
Referring now to Figure 14, determine the 3rd mode of execution of cost signal.In this embodiment, provide question blank 370, it utilizes power request signal 82 to determine license maximum engine speed 372.Engine speed signal 162 and license maximum engine speed signal 372 are provided to comparison frame 374, and this comparison frame determines whether engine speed is greater than license maximum engine speed.When engine speed is greater than license maximum engine speed, frame 376 shows the high damage sign of penalizing.
If in frame 374, engine speed is greater than license maximum engine speed, in frame 378, provides without penalizing and damages sign.
Once cost signal is provided and has penalized damage signal, Fig. 7 just obtains the ultimate cost of each gear.In the frame 222 of Fig. 7, select the gear with minimum ultimate cost as expectation gear.
It should be pointed out that above-mentioned question blank can be tested easily and to be determined by engine calibration.A plurality of intermediate computations are known question blank functions.
Now, those skilled in the art can understand from the above description broad teachings of the present invention and can implement with various forms.Therefore, although described the present invention about its specific embodiment, actual range of the present invention should not be so limited, because those skilled in the art will know other modification by research accompanying drawing, specification and claims.
Claims (19)
1. in the speed changer of automobile, select a method for gear, the method comprises:
According to pedal position and the speed of a motor vehicle, determine power request signal;
In response to the described speed of a motor vehicle and described power request signal, determine the engine speed of each gear;
In response to the described speed of a motor vehicle and described power request signal, determine the Engine torque of each gear;
In response to the described speed of a motor vehicle and described power request signal, determine the transmission components speed of each gear; And
According to described power request signal, described engine speed, described Engine torque and described transmission components speed, determine the gear selection of described speed changer.
2. the method for claim 1, also comprise the transmission components moment of torsion of determining each gear in response to the described speed of a motor vehicle and described power request signal, wherein according to described power request signal, described engine speed, described Engine torque and described transmission components speed, determine that the gear of described speed changer is selected to comprise according to described power request signal, described engine speed, described Engine torque, described transmission components speed and described transmission components moment of torsion and determine that the gear of described speed changer selects.
3. the method for claim 1, also comprise according to described engine speed and described Engine torque and determine motor fuel ratio, and wherein according to described power request signal, described engine speed, described Engine torque and described transmission components speed, determine that the gear selection of described speed changer comprises according to described power request signal, described engine speed, described Engine torque, described transmission components speed and described motor fuel than the gear selection of determining described speed changer.
4. method as claimed in claim 3, also comprise according to described engine speed and described Engine torque and determine discharge amount, and wherein according to described power request signal, described engine speed, described Engine torque, described transmission components speed and described motor fuel, than the gear of determining described speed changer, select to comprise the gear selection of determining described speed changer according to described power request signal, described engine speed, described Engine torque, described transmission components speed, described motor fuel ratio and described discharge amount.
5. the method for claim 1, wherein determines that according to described power request signal, described engine speed, described Engine torque and described transmission components speed the gear selection of described speed changer comprises the gear selection of determining described speed changer according to described power request signal, described engine speed, described Engine torque, described transmission components speed, the described speed of a motor vehicle, wheel circumference, final velocity ratio and gear ratio.
6. the method for claim 1, wherein determines that engine speed comprises the engine speed of determining each gear in response to the described speed of a motor vehicle and described power request signal.
7. the method for claim 1, wherein determines that the engine speed of each gear comprises the engine speed of determining each gear in response to the described speed of a motor vehicle, transmission components speed and power request signal.
8. a method of controlling automatic transmission, the method comprises:
For thering is the described speed changer of gear, determine speed changer turbine trip speed;
In response to described turbine trip speed and power request, determine engine speed;
In response to described engine speed and power request, determine Engine torque;
In response to described engine speed and Engine torque, determine the cost function of each gear;
In response to engine speed and Engine torque, determine the damage of penalizing of each gear;
Cost and penalizing of each gear in response to each gear are damaged definite minimum cost gear; And
Order automatic transmission is selected described minimum cost gear.
9. method as claimed in claim 8, also comprises in response to described turbine trip speed or Engine torque and determines turbine moment of torsion.
10. method as claimed in claim 9, wherein determines for each gear that cost function comprises based on described engine speed, described Engine torque, described turbine moment of torsion and turbine trip speed and determines described cost function.
11. methods as claimed in claim 9, wherein for each gear determine cost function comprise based on described engine speed, described Engine torque, motor fuel than and described turbine moment of torsion and gear ratio determine cost function.
12. methods as claimed in claim 8, wherein determine cost function for each gear and comprise based on described engine speed, described Engine torque and motor fuel than determining described cost function.
13. methods as claimed in claim 8, wherein determine and penalize damage to comprise the damage of penalizing of determining each gear in response to described engine speed, power request and described Engine torque for each gear in response to engine speed and Engine torque.
14. methods as claimed in claim 8, wherein determine to penalize to damage for each gear in response to engine speed to comprise the damage of penalizing of determining each gear in response to power request, described engine speed and the license maximum engine speed based on described power request.
15. methods as claimed in claim 8, wherein determine to penalize to damage for each gear in response to engine speed to comprise the damage of penalizing of determining each gear in response to power request, described engine speed and the license minimum engine speed based on described power request.
16. 1 kinds of control system for speed changer with motor communication, this control system comprises:
According to pedal position and the speed of a motor vehicle, determine the pedal input explanation module of power request signal; And
Real-time gear is selected module, the input explanation module communication of itself and described pedal is also determined the engine speed of each gear in response to the described speed of a motor vehicle and power request signal, in response to the described speed of a motor vehicle and power request signal, determine the Engine torque of each gear, in response to the described speed of a motor vehicle and power request signal, determine the transmission components speed of each gear, and according to power request signal, described engine speed, described Engine torque and described transmission components speed, determine the gear selection of described speed changer.
17. control system as claimed in claim 16, wherein said real-time gear select module comprise in response to described engine speed and described Engine torque produce cost signal cost function module and in response to the signal of described power request signal and described engine speed produce penalize damage signal penalize damage module, described real-time gear select module responds in described cost signal and described in penalize and damage signal and determine that described gear selects.
18. control system as claimed in claim 16, wherein said real-time gear select module comprise in response to described engine speed and described Engine torque produce cost signal cost function module and in response to the signal of described power request signal, described engine speed and license minimum engine speed perhaps can maximum engine speed produce penalize damage signal penalize damage module, described real-time gear select module responds in described cost signal and described in penalize and damage signal and determine that described gear selects.
19. control system as claimed in claim 16, wherein said real-time gear select module comprise in response to described engine speed, described Engine torque, motor fuel than and transmission components speed or transmission components moment of torsion produce cost signal cost function module and in response to the signal of described power request signal and described engine speed produce penalize damage signal penalize damage module, described real-time gear select module responds in described cost signal and described in penalize and damage signal and determine that described gear selects.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10300408P | 2008-10-06 | 2008-10-06 | |
| US61/103004 | 2008-10-06 | ||
| US12/254365 | 2008-10-20 | ||
| US12/254,365 US8055417B2 (en) | 2008-10-06 | 2008-10-20 | Transmission gear selection and engine torque control method and system |
Publications (2)
| Publication Number | Publication Date |
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| CN101713458A CN101713458A (en) | 2010-05-26 |
| CN101713458B true CN101713458B (en) | 2014-10-08 |
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| CN200910179503.9A Expired - Fee Related CN101713458B (en) | 2008-10-06 | 2009-09-30 | Transmission gear selection and engine torque control method and system |
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| US (1) | US8055417B2 (en) |
| CN (1) | CN101713458B (en) |
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| US8540606B2 (en) * | 2009-11-19 | 2013-09-24 | GM Global Technology Operations LLC | System and method for controlling engine torque |
| US8975878B2 (en) * | 2010-12-23 | 2015-03-10 | Caterpillar Inc. | Switched reluctance generator integrated controls |
| US8676455B2 (en) * | 2011-02-15 | 2014-03-18 | Eaton Corporation | Methods and systems for selecting or maintaining an efficient gear or gear ratio |
| US8566002B2 (en) * | 2011-04-18 | 2013-10-22 | GM Global Technology Operations LLC | Engine control systems and methods |
| US8600631B2 (en) * | 2011-05-20 | 2013-12-03 | GM Global Technology Operations LLC | Engine speed assist torque converter clutch control |
| TWI438105B (en) * | 2011-07-22 | 2014-05-21 | Kwang Yang Motor Co | The power generation system of a vehicle and its power generation method |
| JP5626471B2 (en) * | 2011-07-28 | 2014-11-19 | 日産自動車株式会社 | Speed change control device and speed change control method for continuously variable transmission |
| US8700276B2 (en) | 2012-03-13 | 2014-04-15 | Deere & Company | Gear ratio emulation |
| CN103085814B (en) * | 2012-12-26 | 2016-08-03 | 联合汽车电子有限公司 | Manual gear car start-and-stop control system |
| DE102016204657A1 (en) * | 2016-03-21 | 2017-09-21 | Volkswagen Aktiengesellschaft | Method and control device for selecting a gear of a transmission in a drive train of a motor vehicle |
| US9771883B1 (en) * | 2016-03-22 | 2017-09-26 | GM Global Technology Operations LLC | Supervisory model predictive control in an engine assembly |
| US9708985B1 (en) * | 2016-04-19 | 2017-07-18 | Hyundai America Technical Center, Inc. | Matching torque map to shift pattern |
| CN114941707A (en) * | 2022-05-31 | 2022-08-26 | 三一专用汽车有限责任公司 | Gear shifting prompting method and device and engineering machinery |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20100087994A1 (en) | 2010-04-08 |
| US8055417B2 (en) | 2011-11-08 |
| CN101713458A (en) | 2010-05-26 |
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